Stress-corrosion cracking property of aluminum-magnesium alloy processed by equal-channel angular pressing

Hiroaki Nakano, Satoshi Oue, Seiji Taguchi, Shigeo Kobayashi, Zenji Horita

Research output: Contribution to journalArticlepeer-review

6 Citations (Scopus)

Abstract

Stress-corrosion cracking property of an aluminum-magnesium alloy processed by equal-channel angular pressing (ECAP) was investigated by a slow strain-rate tensile technique in a 3% NaCl solution of pH 4.2 at 303 K. The maximum stress and elongation of the Al-Mg alloy were lower in the NaCl solution than in air. The stress-corrosion cracking property was evaluated by the decrease ratio of maximum stress and elongation of the Al-Mg alloy with NaCl solution, I(δ max) and I(δ), respectively. I(δ max) and I(δ) were lower with ECAP than without it, showing that the susceptibility of stress-corrosion cracking decreased with ECAP. The polarization curve and time dependence of the anodic current density at constant potential of the Al-Mg alloy in the NaCl solution revealed that the anodic current density was lower with ECAP than without it, or the corrosion resistance of the Al-Mg alloy was improved by ECAP. The decrease in stress-corrosion crack susceptibility of the Al-Mg alloy with ECAP is attributed to an improvement in corrosion resistance afforded by ECAP.

Original languageEnglish
Article number543212
JournalInternational Journal of Corrosion
Volume2012
DOIs
Publication statusPublished - 2012

All Science Journal Classification (ASJC) codes

  • Materials Science(all)
  • Process Chemistry and Technology

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